Malicious PDF — malware analysis report

Static analysis result for SHA-256 facc4ef0e92d45c8…

MALICIOUS

PDF

83.0 KB Created: 2021-04-30 20:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 128fd2fce2090914fd9a9cf2b8285ad7 SHA-1: 23d8755299473c7f0279811fff7171969cca5bd2 SHA-256: facc4ef0e92d45c8fcd0d8ab341561a430e524c7e4c0522bb5fcb8cd1b4effb5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains references to "wkhtmltopdf" and a date, suggesting it was generated programmatically to appear as a guide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/strik?utm_term=how+to+use+movie+maker+pro PDF link annotation
    • https://cdn.sqhk.co/govizanorev/hbiafjj/viralukigupemu.pdfIn PDF document text
    • https://cdn.sqhk.co/wemukubiv/chj5vjc/brahma_songs_ing_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/iCBjidG/83454010744.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/gf2ghhe/vanafasutukage.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/hB7gejg/bolapekegozuk.pdfIn PDF document text
    • https://cdn.sqhk.co/zagekexeroze/BNiaCDF/saditawe.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/bOYdjbe/vigizaroluvabujadokixo.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/hc2X1ic/xebupoded.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/jjUhe5a/grievance_process_template.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/qK8iXjb/63542281051.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuladupanekeziv.epizy.com/avian_anatomy_atlas.pdfIn PDF document text
    • http://vosanibom.rf.gd/kiwusufabifuluvu.pdfIn PDF document text
    • http://sonatufekofefab.rf.gd/demedudujepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14316c90-1340-4007-8036-027bc80fe1c5/95346077794.pdfIn PDF document text
    • http://farapatenaru.rf.gd/kabavinivesi.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/51222701518.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/apache_poi_read_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2b917c-390c-4da7-a6bf-e41ae69418f9/quran_with_urdu_and_english_translation_online.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 5112 bytes
SHA-256: 6b4804939dec1ab5f17ac912479a77a32431d06e74a233daa39b58f81dedcce9
font_01_sfnt_off00011a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A32 10832 bytes
SHA-256: 6ff536679b0a3c072fa8be1814cf49aea0e033bad4adca738ad223a17dfeee24

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